I have questions about audio timing and volume levels

I have a question regarding editing the audio timing. There are a few section in my clip that the rythym is a split second off. What technique can I use to sync up the time by just a fraction of a second?
so far I've tried use the re-time editor which I thought was gonna work but after I re-timed the section, I couldn't drop it back into place without having the lower clip change and make things more confusing, but I had a feeling I was doing thing right for a second. Was I on the right track or is there another way of doing this?
on another note...
I have some sections in my clip that are peaking in the red, but sound fine on my computer even at full volume. I hear no distortion at all. Does this pose as a problem, and should I re-adjust?
how to connect cuts in final cut pro

This is actually a somewhat complicated subject. There are actually several different kinds of sync issues. Two major "classes": 1) some audio seems to speed up or slow down over time compared to other audio, and 2) audio that just needs to be aligned in time.
One of the biggest culprits for sync issues is mixed bitrates. A typical FCPX project should default to an audio bitrate of 48kHz. If you have 44.1kHz (or other bitrate) clips, mixed in, the first thing you should do is make sure all your audio clips are conformed to your project.
Select your clips and then select:
[Note: when retiming clips, even if only slightly, make sure Preserve Pitch is selected.]
If that doesn't work, or your audio is "live" recordings and you'd like to tighten up performers timing a little, you can manually sync audio tracks to each other. (You should have at least one audio "track" with the best timing to be your "beat track".)
The idea is to find the events you need sync'd in the audio waveforms; which means listening and seeing the pattern in the waveforms (turning on "scrubbing" helps); and you should find these indicators as close to the end of the clip as possible (you will need to zoom into the clips to see them clearly enough and you will need room to access the retiming slider on one of the clips... so... near the end is best.)
Zoom into the audio clip on the storyline so you can see the waveform clearly, but not so far as to lose detail in the "subsample" range -- to start (it's very difficult to distinguish specific peaks if you zoom in too far.)
With the audio clip selected and the playhead placed on the start of the "event" (bass beat, tom/snare hit, cymbal, etc.) type the M key to set a marker (markers on audio clips can be set on subsamples, so it will be "inside" a single video frame range.)
On corresponing clips that you want to sync with the "master" clip, do the same thing: select the clip, find the corresponding "event" start for that clip, move the playhead to the beginning of the event (you might have to zoom in [command- +] on the storyline one or two times more to improve the resolution), type M to set a marker.
You now have two markers you can align by retiming one (or more) of the clps to match the "master". Use the playhead and have it 'snap' to the master's marker. When you retime the others, visually align their markers to the master's by using the playhead as a visual indicator for alignment.
This technique can be used with video and audio that has gone out of sync, by finding the visual indicators of a specific sound in the video, setting a marker to mark the start of that event, then finding the audio event and setting a marker. You will need to detach the audio from the video first if you're going to work on it in this way.
It's even easier to sync audio if there are no retiming issues (that is, you just need to align clips, not retime them.) Find the position markers as in the description above (anywhere in a clip since retiming is not necessary), turn on snapping, drag one of the clips until the markers snap... and you're done. You don't even need to use the playhead to have the markers snap to alignment with each other. Very convenient for adding foley/sound effects to video.
HTH

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It's better than nothing, but only just."""

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